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The Audio preamplifier with dual recording

The Audio preamplifier with dual recording using IC BA3420AL. The Audio preamplifier with dual recording using IC BA3420AL. It has an internal switch for switching between playback head, mic and radio input modes, and also includes a bias oscillator and regulated voltage source for radio use. All control is possible with one external switch, allowing […]

Simple USB Microcontrollers Circuit

Microcontrollers USB Circuit Using PIC16C745 8-Bit cmos, Microcontrollers USB Using PIC16C745 Power-up Timer (PWRT) and Oscillator Start-up Timer (OST). Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation. Brown-out detection circuitry for Brown-out Reset (BOR). Programmable code-protection.  Power saving SLEEP mode. Selectable oscillator options – EC – External clock (24 MHz) – […]

Make Wireless portable with CA3140,4069,4098

Parts: R1,R2,R19_______1K 1/4W R3-R6,R13,R17_100K 1/4W R7,R15__________1M 1/4W R8_____________50K 1/2W R9____________470R 1/4W R10___________470K 1/4W R11___________100K 1/2W R12___________220K 1/4W R14,R16________68K 1/4W R18____________22K 1/4W R20___________150R 1/4W C1,C7_________100µF 25V C2,C3_________330nF 63V C4-C6___________4µ7 25V D1,D5______Red LEDs D2,D3________1N4148 75V D4________BZX79C7V5 7.5V 500mW IC1__________CA3140 or TL061 IC2____________4069 IC3____________4098 or 4528 Q1,Q2_________BC238 25V 100mA NPN L1_____________10mH miniature Inductor BZ1___________sounder (incorporating 3KHz oscillator)

Lamp scr schematic

Lamp scr Lamp circuit using BS250, BS170

Demodulator Tuner

FM Stereo Demodulator Tuner Part R1,7,9     1K R2     18K R3     12K R4     680 Ohm R5,6     3K9 R8,10     22K R11,12     1M5 R13     220 Ohm R14,16     3K3 R15,17     330 Ohm C1     500pF C2     1uF/16V C3     33nF C4     470pF C5     470nF C6,7    […]

Where can I get TV circuit diagram to repair my own TV? Can’t seem to find it on the find on the web?

SukhdevS asked: The model is Sony Trinitron KVJ14P1S (14 inch). I stay in KL, Malaysia.

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